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cdn.mainichi.jpPb, sn, zn @ Sn — 45 — (1 1 11 o 13 14 Ag @ zn (2608—45) 2 + + 2 C02 (1) & & fñJ% -C C02 0.0109 ca2+ C2042- CaC204 & U -c 4.38 g D CaC204+120 (N 146) Fe2+ (a)

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